Fireproof construction



(No Model.)

M. H. ORITTENDEN & F. V. EMERY. FIRBPROOF GONSTRUGTION.

N0. 508,502. Patented No'v. 14, 1893.-

witnesses I Inventors Mas on ff. CrzJ/te 11,166 n m Fran/ 6 ILFmery. V

I By zlzez'rdtzorney the feet of the floor-joists.

UNITED STATES PATENT ()FFICE.

MASON H. ORI TTENDEN AND FRANK V. EMERY, OF MlNNEAPOLlS, MINNESOTA.

FIREPROOF CONSTRUCTION.

SPECIFICATION forming part of Letters Patent No. 508,502, dated November14, 1893. Application filed April s, 1893. seat-.1 No. 468,831. (Nomodel.)

T0 at whom it may col worn.-

Be it known that we, MASON H. GRITTENDEN and FRANK V. EMERY, citizens ofthe United States, residing at the city of Minneapolis, in-

the countyof Hennepin and State of Minnesota, have jointly inventedcertain new and sheet-metal pieces fastened together and having theirends supported by the flanges of the floor-joists; attaching to theunder side of the ceiling-joists metallic lathing, and placing on theirupper surfaces metalsheets u pou which can be laid cement, tiling, orother fire-proof materiaL. v

Our improvements are illustrated in the accompanying drawings, in whichFigure 1, shows a sectional elevation of a floor and ceiling and theirsupports, constructed in substantial accordance with our improvements;and Fig. 2, a transverse section of the same on the line 90-00 of Fig.1.

In such drawings 1 designates the floorjoists of metal and I-shaped; and2 ceilingjoists which are preferably constructed of two strips ofsheet-iron bent to channelshape and secured together at proper intervalsby rivets 3, forming I-shaped bodies. The ends of the ceiling-joiststhus constructed are provided with slots 4 of proper shape to fit thefeetor flanges of the floor-joists. The metal at the upper edges ofthese slots is bent outward at opposite sides to form flanges 5 for thepurpose of providing comparatively wide bases for seating theceiling-joists on Ceiling joists thus constructed and supported andplaced at suitable intervals, are sufficiently strong and providesuitable means for attaching and supporting metallic lathing of almostany usual construction, and also to sustain the weight of a superposedfire-proof body.

In the drawings there is shown, for the purpose of illustrating the modeof attaching the lathing to the joists, a sheet-metal lathing 6 havingat intervals grooves or depressions 7, and the lathing is shown to beattached by means of nails 8 driven through the lathing and betweenthesheets composing the ceiling-joists. As will be understood, there issufficient elasticity in'the sheet-metal members forming the joists topermit nails to be driven between them at intervals and force themembers slightly apart, while the latter serve to firmly clamp thenails.

The bodies of the ceiling-joists above the feet of the floor-joists maybe of any desired height, in view of the kind of fire-proof filling tobe used above it. It is preferable to place on the top of the joists 2sheets of corrugated sheet-iron 9 for supporting the fireproof packing;and on these, as a foundation, cement 10, or any other suitablefireproof or non-conducting material may be laid, and be madeof suchthickness as may be desirable in any particular structure. The materialmay be made to fill the entire space above the foundation 9 to the levelof the tops of the floor-joists, and on it may be laid a tiling, woodenor other floor. Such construction is a desirable and cheap substitutefor the ordinary arched ceilings formed of corrugated iron orterra-cotta, and at the same time provides convenient means forsupporting a flat plastering surface for the ceiling.

It is not intended herein to claim broadly the character ofceiling-joists, or other building member described, for that feature isreserved to be claimed in another application concurrently pendingSerial No. 468,833, filed April 3, 1893.

Having described our invention, what we claim is- 1. The combinationwith floor-joists and sheet-metal ceiling-joists supported on the feetof the former, ofmetallic lathing sup ported by the ceiling-joists belowtheir bases and fire-proofing material supported on their uppersurfaces, substantially as set forth.

2. The combination with floor-joists, of sheet-metal transverse joistsseated on the feet of the floorjoists, corrugated sheettween suchpieces, of a metallic base seated [0 metal supported on the transversejoists, and on the ceiling joists and fire-proofing matefire-proofingmaterial supported by the corrial thereon, substantially as set forth.

rugated sheets, substantially as set forth. M ASON H ORITTENDEN 5 3. Thecombination with floor-joists, and FRANK V. EMERY.

sheet-metal ceiling-joists constructed of flanged sheet-metal piecessecured together Witnesses:

back to back and adapted to support lathing P. H. GUNCKEL, by means ofnails driven into the joists be- R. BLUME.

